A WEDDING is a special moment for any family, but these nuptials were more poignant than most.

Just after exchanging vows with his new wife, Diogo Bolant, 37, surprised her six-year-old daughter in Brazil.

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Diogo Bolant wanted his new step-daughter Isadora to feel part of the family

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He proposed to her just after marrying her mum, asking if she would like to be his child forever

The moment was caught on camera and sees Diogo kneeling down so he's the same height as Isadora, before asking her a highly-emotional question.

"Do you agree to be my daughter forever?" he said in Sao Bernardo do Campo, Sao Paulo.

Little Isadora immediately started nodding her head, looking on in astonishment as Diogo placed a ring on her finger.

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The six-year-old girl was stunned by what happened and didn't know what to do

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Isadora couldn't help bursting into tears

She suddenly seemed to grasp how important the moment was, and the emotion became too much for her.

The tot grasped at her mum Nicole's dress as she started crying, before launching herself into her step-dad's arms.

The whole thing was given the seal of approval by the pastor who officiated the wedding.

"So seals the alliance," he said.

The tear-jerking moment was caught on film by Blessed Space Company, who hosted the wedding ceremony.

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It was all pre-planned, with Diogo letting them know what he wanted to do before the big day.

"The little girl had no idea this was going to happen. All the guests and our team of organisers knew and were thrilled and close to tears too, even though we were in on the secret beforehand," Edilaine Gaeta, commercial manager for the company, said.

The video's already been a big hit on Facebook, with the newlyweds amazed by how well it's gone down.

"We wanted Isa to participate in our wedding ceremony because she is at that phase where she loves all things about princesses and is in love with the idea of being a bride," Nicole told Brazil's Extra newspaper.

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The scene ended with Diogo and his step-daughter having an emotional hug

"Isadora has a biological father who is present in her life and no one can take that relationship away from her.

"However, Diogo has this love, a true love, and affection for her [Isadora] which is bigger than any title."

Diogo added: "I had this idea of a surprise with Nicole a little while ago. It was so Isa could feel part of this family that is forming."